Precalked extensible joint for pipes



March 7, 1933. y w. A. WHITING PRECALKED EXTENSIBLE JOINT FOR PIPES Filed April 1, 19:50

QTTOQNE! hatented 7, W33

artisan- W'HJLMH A. WING, OB HUIWGTOK BARK, CALIFORNIA, ASSIGKOB T Amman" GGIBTCEE'EE PIPE COMPANY, A. COEP ORATION OF DE AWABE EEECMKEB' EXTEKSELE JOINT FOR FEES- nppllcattoa filed April 1, race. Serial No. 440,715.

This invention relates to an extensible joint for use in installing pipe such as is used in water mains, irrigation systems, drainage systems, sewers, etc.

ii Theprimary object of this invention is to provide a joint for use in laying ipe of this nature that is characterized by aving elements therein which permit longitudinal contraction and expansion of the pipe line,,and

maintain a water-tight seal at all times.

In practice, the use of pipe, such, for instance, as precast concrete p pe or steel pipe, introduces the objectionable feature of broken joints caused by ex ansion and contraction of the pipe. Accor ingly, it becomes an object of this invention to provide a ipe joint adaptable for use with pipe whic is provided with a flexible asket that serves to seal the joint and permit relatively longitudinal movement between adjacent I pipe sections. p

The joint contemplated by this invention consists of a pair of concentric metallic rings with a flexible non-corrosive gasket inserted between said rings, one of said rings being secured to the end of a pipe section, and the other of said rings being left free for attachment. to an adjoining pipe section. The flexible gasket is introduced between the concentric rings in such a manner that it will yield in response to relative lateral movement of the rings. The joint thus provided yields several advantages, amongst which meg be included the following:

y providing a joint of this character upon a section of pipe, the joint ma be tested for leakage in the shop before being sent to the job for installation, thus eliminating all pos sibility of leaky installation.

Furthermore, the use of a. joint of this character prevents infiltration of roots into cracks or crevices in the pipe line, which eventually disrupt and interfere with water circulation.

The use of a joint of this character also provides a water-tight joint that does not leak after continued expansion and contraction oi the pipe line. a

A noteworth feature of this invention is 5% the provision of self-centering means for 1 laying conservative joints. This ieatureis an integral part of the pipe, and also openates to advantage in providing-a means of forming a solid column ofpipe for forcing the sections to travel during expansion, thus relieving the flexible gasket of destructive pressure.-

It is another object of this invention to provide a precalked joint in a precast pipe ending itself particularly to economy oi manufacture and the formation of a comletely tested fluid sealing means within the actory before being sent to the'job Other objects an advantageswill appear as the description proceeds in connection with the drawing, in which- Fig. 1 is a, longitudinal section showing one ty e of my joint; g

ig. 2 is a section on line 2-2 of Fig. 1

Bi 3v is an enlar ed f entary view showing the details 0 my jomt;

Fi 4 is an enlarged fragmentary view showing another form of my oint; and

Fig. 5 is a fragmentar view showing one method of-formin the joint in the factory. 18

In the drawing illustrating my invention, I have shown a section of pipe A joined to a section of pipe B, the manner of joining involving my invention.

Referring now to Fig. 3, the joint utilized in joining the sections A and B ma be further described as' comprising suita le noncorrosive rings 11 and 12 mounted upon the spigot end of the pipe A. later osed between the rings 11 and 12 is a suite 1e gasket 13 arranged to formra seal between the rings 11 and 12, which are concentrically related. As shown, the rings 11 and 12 are each provided with lugs or ribs 14 and 15, respectively, which are arranged in a manner to form a bond between the rings and the pipe sections. The ring 11 is mounted upon a redu end portion 16 of the ipe section A, and the lugs 14 form a bond t erewith.

Although this description will be directed to the embodiment of my invention with concrete pipe, nevertheless I make mention that it may be employed equally as well w1th steel pi e or with tile pipe.

n making precast concrete pipe, 1t is a 100 comparatively sple matter to mount a ring, such as ll, upon a reduced'end of the pi 5 section. Ar the pipe section has scient y set with the ring ll in place, the ring 12 may it be pressed on in the manner shown in Fig. 5,

or the rings 11 and 12 with the gasket 13 interposed therebetween may be mounted as a unit at the time of casting the pipe section A. Attention is called to the shoulder 17 on the 10 spigot end of the pipe section A, which enwhen the pipe expands, it expands against a continuous line of pipe sections. The belied end 19 of the pipe section B is formed with an internal annular recess dlh'whichis substantially of equal width with the length oil .25 the ring 12. The recess 20 is provided with an'jopening 21 for introducing a sealing comand into the joint. Such a. compouhd may o a mastic compound suitable for. flowing around-and into the crevices provided in the 8 joint, and edecting a water seal in all parts of, the joint. The sections A and B may be provided with suitable reinforcements such as shown at 22. In the joint the in Fig.

at trated another form of my invention in which the self-centering means is transferred from .the boiled end to the spigot end of the pipe.

In this view, the section A is equipped with an ending section .28 which extends into l an annular recess 24. within the section B. In this arrangement, the means of sealing the joint and the same form of my invention involving the concentric rings and the flexible gasket is embodied in identically. the same manner as described with relation to Fig. 3.

In Fig. 5, l have somewhat diagrammatically she a way of assembling the concentric rings with the gasket mounted between. lit is to be understood that the rings may be assembled in this manner after one or the rings has been cast upon a joint, or that the mags may be assembled in this manner and then cast upon the end of a joint, and t also might be stated that the rings, instead to oil being mountedupon the spigot end ot a pipe section, may be mounted upon the belled end of a pi e, and my invention is intended to include all such arrangements and ads tations oi the concentric rings having a enitt ble gasket therebetween. The nature ofthe gasket contemplated by this invention may be characterized y having suitable flexibility to ermit a rolling between the two rings.

or this purpose, it may be a soft lead gastt ket or a lead gasket having a fiber core, or it till . H end pipe section. A, l have illus- 'upon a pipe section; a flexible neonate me he of any suitable dhle metal or .ria having non-corrosive properties. e

rings themselves are also characterized by be ing formed of suitable non-corrosive ate rial. A joint of this nature will he a premated as providing a water-tight joint in which elements are arranged to permit relative 110a gitudinal movement of the j acent pipe tion and a joint in which-the deterioration is practically nil. In installing joints ofthis character, no calking, and, consuentl, no

preparation for calking is require '2 neiter is it necessary to make preparation for retaining the astic sealing material within the joint. In t is res ect, attention is directed to the shoulders I andl8 which form a eriect seal for mastic sealing material, whic is intr duped through the passage 21s n bled with the openings 2i extendg upward practice, the joints would be assemly and the shoulders 17 and 18 close]. shot 1 tin 'and the plastic sealing materia would be introduced into the joints and would dew eficie'nt when used in conjunct on with a male and female pipe joint or a tongue and cove arrangeent instead of a spigot and l lled- Although I have she my invention as embodied in precast ooncretipe, nevertheless ll am awarefthat other adaptations may be made. Consequently, itis my intention to include all such adaptations and modifications of my invention vthat come within the scope of the specification and the purview of the a ended claims.

I c mm as my invention:

i. In a pipe joint of the character de= scribed: a pair of concentric rings mounted gasket inten posed between said rings; and means on said rings for edecting a bond between said rings and said pipe section.

2. in combination with a section of pi w a ring secured to one end thereof; a dole.

gasket mounted on said rin; and a second rino concentrically mounts on said gasket an adapted for attaching to a second section of pipe.

3. n combination with a section oi pipe: a ring secured to one end thereof; a den ible gasket mounted on said ring; a second rin concentrically mounted on said gasket an adapted for attaching a second section of pipe; and means for shooting a bond between said rings and said pie sections.

t. in combination with a lied end of a pipe section: a spigot end of a pipe section having preformed means thereon for to m ing an extensible joint between said sections;

separate means for centering said spigot end in said belied end, and means for bondm said preformed means to said belied end 0 the other pipe section.

5. In combination with a belied end of a pipe section: a spigot end of a pipe section having preformed means thereon for forming an extensible joint between said sections;'and separate means for centering said spigot end in said bclled end, said last mentioned means comprising cooperating shoulders on said spigot end and said belied end, respectively.

(i. For use in joining pipe: 21 pipe'section having a precalked joining means bonded on one-end thereof, said means'comprising concentrically mounted rings axially movable with respect to each other and a flexible gasliC'irlierebetween.

7. in combination: a belled end pipe section; a spigot end pipe section; a precalked joining means bonded to said spigot end and adapted to freely enter said belied end, said joining means embodying a ring mounted on said spigot end; av flexible gasket concentrically mounted on said ring; a second ring concentricaliy mounted on'said gasket; and means for bonding said second ring with said belied end.

8. In combination: a belied end pipe section; a spigot end pipe section; a precalked joining means bonded to said spigot end and adapted to freely enter said belied end, said joining means embodying a ring mounted on said spigot end; a flexible gasket concentrically mounted on said ring; a second ring concentrically mounted on. said gasket; and

means for admitting a, plastic sealing material through said belied end to bond said second ring with said belied end. 4

9. In combination: a belied end pipe section; a spigot end pipe section; a precalked joining means bonded to sai spigot end and adapted to freely enter said belied end, said joining means embodying a ring mounted on said spigot end; a flexible gasket concentrically mounted on said ring; a second ring concentrically mounted on said gasket; 7

means for centering said spigot end and said belied end; and means for bonding said second ring with said belied end.

10. For use in joining pipe: a pipe section having a p'recalked joining means bonded on one end thereof, said means comprising concentrically mounted rings with a flexible gasket therebetween; and the outer ring being adaptable for bonding with-a. con tiguous pipe section.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 21st day of March, 1930.

. WILLIAM A. WHITING. 

